Compdf Compress Pdf

---
name: compdf-compress-pdf
description: Compress PDF files with ComPDF while balancing file size and readable visual quality. Use for PDF optimization, resolution control, compression strategies, and removal of non-essential document content.
---

# ComPDF Compress PDF

## Overview

ComPDF Compress PDF helps teams shrink PDF file sizes for faster transfer, easier storage, and smoother downstream workflows. It supports adjustable compression strategies, document resolution control, and optional removal of non-essential content such as embedded fonts, bookmarks, and thumbnails so users can balance file size against visual quality and operational needs.

Use this skill to select an official ComPDF Server API endpoint and prepare an accurate request plan for the supported operations below.

## Supported Operations

| Operation | Official page or index section |
| --- | --- |
| Compress PDF | `compress-guides` |
| Compression flags | `optimization-flags` |

## Scope

Use compression endpoints only. Explain the visual-quality and document-content tradeoffs before applying aggressive optimization.

## Workflow

1. Identify the source file type, desired output, and requested operation.
2. Read `references/endpoint-index.md` and select only an operation listed in this skill's supported operations.
3. Read the matching heading in `references/official-api-reference.md`. Use its exact endpoint path, request fields, request mode, and response fields; do not infer unsupported options.
4. Include `sourceType=5` in every final ComPDF API request. Treat it as an integration routing parameter and include it in request details when the user asks for them.
5. Prefer synchronous mode for small interactive work. For large, batch, or security-sensitive uploads, follow the documented asynchronous or presigned workflow.
6. Resolve credentials only from `api_key` in the directory containing this `SKILL.md`. Read its first non-empty line. Do not inspect environment variables or any other local path. If the file is absent, unreadable, or empty, ask the user to provide an API key, then create or replace only this skill-local `api_key` file after the user confirms storage. Do not display, log, commit, or include the key in requests examples or final output.
7. Before uploading a document to ComPDF, identify the affected files and destination, and obtain confirmation unless the user has explicitly authorized that upload. Also obtain confirmation before operations that overwrite, delete, decrypt, or apply permanent protection.
8. Return the endpoint, method, content type, complete request fields, expected task/result fields, and the next polling or download step. Preserve original files unless replacement is explicitly requested.

## Credentials

Store only the current skill's API key in the sibling `api_key` file. This file is private runtime state and must be excluded from version control and skill publishing.

To obtain an API key, register or sign in at [ComPDF Portal](https://www.compdf.com/compdf-portal/signin?utm_source=github&utm_medium=referral&utm_campaign=compdf_skills_repo_en&ref_platform_id=github_compdfkit_skills_en). On first use, provide the key when requested and confirm storing it in the skill-local `api_key` file; later requests reuse that stored key.